Viewing archive of Friday, 13 December 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 Dec 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 348 Issued at 2200Z on 13 Dec 2024IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M2 event observed at
13/1124Z from Region 3917 (S08W56). There are currently 4 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate on
days one, two, and three (14 Dec, 15 Dec, 16 Dec).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 362 km/s at 12/2210Z. Total IMF reached 7 nT at
13/1211Z. The maximum southward component of Bz reached -6 nT at
13/1544Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 834 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (14 Dec) and quiet to unsettled levels
on days two and three (15 Dec, 16 Dec).
III. Event Probabilities 14 Dec to 16 Dec
| Class M | 55% | 55% | 55% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Dec 164 Predicted 14 Dec-16 Dec 165/165/170 90 Day Mean 13 Dec 200
V. Geomagnetic A Indices
Observed Afr/Ap 12 Dec 004/003 Estimated Afr/Ap 13 Dec 004/005 Predicted Afr/Ap 14 Dec-16 Dec 005/005-008/010-009/008
VI. Geomagnetic Activity Probabilities 14 Dec to 16 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 30% | 25% |
| Major-severe storm | 15% | 30% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 107.7 +21.8 |
| Last 30 days | 100 +44.8 |
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